Push rod in an electrical pump adapted for use with a piston rod in an air nozzle

ABSTRACT

An electrical pump adapted for use with a piston rod in an air nozzle has an electromagnetic valve board with an electromagnetic valve thereon. A Z-shaped push rod is provided to be adapted to be driven by the electromagnetic valve so as to drive the piston rod to move accordingly. The movement of the Z-shaped push rod allows air from the electrical pump to be pumped into an object to be inflated when the motor is running, and air inside the object to flow out of the object to be deflated when the motor is not running.

BACKGROUND OF THE INVENTION

[0001] 1. Field of the Invention

[0002] The present invention relates to an electrical pump, and more particularly to a push rod in the electrical pump so that the push rod is able to be driven by an electromagnetic valve in the pump to push the piston rod in an air nozzle.

[0003] 2. Description of Related Art

[0004] In the past, when a user tried to inflate an object, a pump was definitely required to pump the air into the object. However, when deflating the object was required, the user then had to use both hands to compress and deflate the object.

[0005] Using hands to deflate the object is practical if the object is small in size but when the object is large in size, e.g. an air mattress, the effort required to deflate object may then last for quite a long time. To overcome the shortcoming of using hands to deflate the object, an air nozzle is mounted on the object so that when deflation of the object is required, the user just pushes backward the piston rod inside the object whereby the movement of the piston rod inside the object opens the air nozzle such that due to the pressure inside the object being larger than that outside the object, air flows quickly to outside the object.

[0006] Still, using this method is troublesome because everytime the user has to manually push the piston rod backward into the object to deflate the object even though there is an electrical pump on the side.

[0007] To overcome the shortcomings, the present invention tends to provide an improved electrical pump to mitigate and obviate the aforementioned problems.

SUMMARY OF THE INVENTION

[0008] The primary objective of the present invention is to provide an improved electrical pump with a push rod adapted to be engaged with the piston rod in an air nozzle on an object to be inflated/deflated such that the push rod is able to be driven by an electromagnetic valve in the electrical motor to accomplish the required purposes.

[0009] Other objects, advantages and novel features of the invention will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

[0010]FIG. 1 is an exploded perspective view of the pump of the present invention;

[0011]FIG. 2 is a perspective view of the pump of the present invention in assembly;

[0012]FIG. 3 is a perspective view of the air nozzle mounted on an air mattress that is to be inflated; and

[0013]FIG. 4 is a schematic view showing the cooperation between the push rod and the piston rod of the air nozzle.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

[0014] With reference to FIG. 1, an electrical pump in accordance with the present invention includes a cylindrical base (1), a motor (2), a motor bracket (3), a blade assembly (4), an electromagnetic valve board (5) and a cover (6).

[0015] The base (1) has a closed end and an open end.

[0016] The motor (2) has a motor shaft (21) extending out of the motor (2) and multiple threaded holes (22) defined in a top face of the motor (2).

[0017] The motor bracket (3) has a through hole (31) defined through a periphery of the motor bracket (3) to correspond to the motor shaft (21) and multiple securing holes (32) in communication with the threaded holes (22). Multiple first bolts (33) are provided to correspond to the securing holes and the threaded holes (22).

[0018] The blade assembly (4) with multiple air flow blades (not numbered) has a shaft hole (41) corresponding to the motor shaft (21) of the motor (2).

[0019] The electromagnetic valve board (5) has multiple positioning holes (51) defined through a periphery of the electromagnetic valve board (5), multiple second bolts (52) corresponding to the positioning holes (51), an electromagnetic valve (53) securely mounted on top of the electromagnetic valve board (5) to generate a magnetic field when required and a push rod (54) in engagement with the electromagnetic valve (53) but movable with respect to the electromagnetic valve (53). The cover (6) has multiple legs (not shown) extending downward to correspond to the positioning holes (51) and the second bolts (52).

[0020] When in assembly, the motor shaft (21) is extended through the through hole (31) of the motor bracket (3) and the shaft hole (41) of the blade assembly (4). The first bolts (33) are extended into the securing holes (32) and the threaded holes (22) to securely engage the motor bracket (3) with the motor (2).

[0021] Then the second bolts (52) are extended into the positioning holes (51) of the electromagnetic valve board (5) with the electromagnetic valve (53) mounted thereon to securely engage the electromagnetic valve board (5) with the cover (6).

[0022] Thereafter, the cover (6) with the electromagnetic valve board (5) is securely connected to the base (1) to sandwich the blade assembly (4), the motor bracket (3) and the motor (2) with the base (1).

[0023] With reference to FIG. 2, it is to be noted that after the assembly of the electrical pump of the present invention, there is a nozzle (7) in communication with an inside of the electrical pump.

[0024] With reference to FIGS. 3 and 4, an air nozzle (8) is provided on an object to be inflated and has a spring-driven piston rod (81). The piston rod (81) is attached to a seal (82) which closes an air channel inside the object so that when the seal (82) of the push rod (81) is securely attached to an inner face of the object to be inflated, the engagement between the seal (82) and the inner face of the object is air tight. However, when the seal (82) is detached from the inner face of the object, air outside the object is able to communicate with the air inside the object.

[0025] With reference to FIG. 4, a distal end of the Z-shaped push rod (54) is in engagement with the piston rod (81). Therefore, when the electromagnetic valve (53) is energized to push the push rod (54), the push rod (54) is able to push the piston rod (81) to move, which opens the air channel inside the object to be inflated/deflated. Accordingly, when the motor (2) is running, the air flow is able to be pumped into the object to be inflated. However, when the motor (2) is not running, the movement of the push rod (54) as well as the piston rod (81) allows the pressurized air inside the object to flow out of the object.

[0026] The advantage of using the electrical pump of the present invention is that as long as the electrical pump is connected to the air nozzle, no matter whether inflation or deflation is required, the work is entirely hands-free. The user will no longer be required to manually depress the piston rod when deflation of the object is required.

[0027] It is to be understood, however, that even though numerous characteristics and advantages of the present invention have been set forth in the foregoing description, together with details of the structure and function of the invention, the disclosure is illustrative only, and changes may be made in detail, especially in matters of shape, size, and arrangement of parts within the principles of the invention to the full extent indicated by the broad general meaning of the terms in which the appended claims are expressed. 

What is claimed is:
 1. In an electrical pump adapted for use with a piston rod in an air nozzle, the electrical pump provided with a base, a motor, a motor bracket securely connected to the motor, a blade assembly rotatably mounted on the motor bracket, an electromagnetic valve board with an electromagnetic valve thereon, a cover securely connected to the electromagnetic valve board and the base to sandwich therebetween the motor, the motor bracket, the blade assembly and the electromagnetic valve board, wherein the improvement comprises: a Z-shaped push rod adapted to be driven by the electromagnetic valve so as to drive the piston rod to move accordingly, thereby allowing air from the electrical pump to be pumped into an object to be inflated when the motor is running, and allowing air inside the object to flow out of the object to be deflated when the motor is not running. 